304 FORAMINIFERA 



Genus GLOBIGERINELLA Cushman, 1927 



Plate 47, figures 4, 5; plate 48, figure 7 

 Genoholotype, Globiycrina aequilateralis H. B. Brady 

 Glohiyerinella Cushman, Contr. Cushman Lab. Foram. Res., vol. 3, 1927, 

 p. 87. 



Test trochoid in the young, at least in the microspheric form, 

 later becoming planispiral; aperture single, large, opening into 

 the umbilicus in the young, in the adult median; fine spines 

 covering the test in well preserved specimens. 



Cretaceous to Recent. 



EXPLANATION OF PLATE 47 



Globigerinidae 



Fig. 



1-3. Glohigerina triloba Reuss. (After Rhumbler). Fig. 1, Dorsal 

 view, showing Discorbis-\\ke young of microspheric form. Fig. 

 2, Side view. Fig. 3, Side view of Discorbis-like young stage, 

 smooth, without spines. 

 4, 5. Globigerinella aequilateralis (H. B. Brady). Fig. 4 (After H. B. 

 Brady). X 35. a, side view; b, peripheral view. Fig. 5 (After 

 Rhumbler). Showing smooth, trochoid young. 

 6, 7. Hastif/erina pelagica (d'Orbigny). X 35. (After H. B. Brady). 

 Fig. 6, Peripheral view. Fig. 7, Side view. 

 8. Hastigerinella digitata (Rhumbler). (After type figure), a, 

 dorsal view; b, ventral view. 



9, 10. Orbulina universa d'Orbigny. (After Rhumbler). Fig. 9, Early 

 stage showing Disco^-bis-like young. Fig. 10, Adult globular 

 chamber with Globigerina stage inside. 



11-13. PuUeniatina ohliqiiiloculata (Parker and Jones). Figs. 11, 12 

 (After H. B. Brady). Fig. 11, Section showing early Globi- 

 gerina stage. Fig. 12, Exterior. Fig. 13 (After Rhumbler), 

 Viewed by transmitted light showing early included Globigerina 

 stage. 



14-17. Sphaeroidinella dehiscent (Parker and Jones). Figs. 14-16 

 (After H. B. Brady). Figs. 14, 15, Exteriors. X 35. Fig. 16, 

 Section through test. Fig. 17 (After Rhumbler), a, vertical 

 section of wall; b, outer surface. 



18-21. Candeina nitida d'Orbigny. X 35. (After H. B. Brady). Fig. 

 18, Dorsal view. Figs. 19, 20, Side views. Fig. 21, Ventral 

 view. 



